Tool-holder for key-seating machines.



Patented Sept. 17,1918.

W. GILES. TOOL HOLDER FOR KEY SEATING MACHINES.

APPLICATION FILED MAR.24| I9l6.

' V ATTORNEY tween the'face of the invgrrnn snares Parana osmosis.

' I' iI I 1 15,.OiSACHIIAW,liliIcri tz eiv,.essfenoufirg Air. ,FEFFIELL&' ('10.; "0F SAGIN'AW, MICHIGAN, A CORPORATION OF MICHIGAN.

TOOL-HOLDER FOR KEY-snierine MACHINES.

To all whom it ma comm;

- "Be it'known'that I, WILL AM'GILES, a V citizen of the United, States,residing at Saginawg'in the county'fof Sagi'n'aw and State of' Michigan,have invented certain new and f useful" Improvem ents 'in "Tool- Holdersfor Key 'Seatin "Machines; and I 'do hereby'decla're the fo lowing to bea full,

' same.

This invention relates'to key-seating machines and pertains moreparticularly to an -improved construction and arrangement of the toolholding device, whereby the objects of 'iuy'invention are attained. I

These objects areffirst, to provide a toolholderffor key seatingmachines that is capable of feeding the cutting tool progressively intothe work while supportingthe tool in such a manner that chattering andvibration are'prevented' andthe liability of getting particles of metalor dirt between theback of the tool and itssupporting surface iseliminated.

Much difliculty has been experienced in practice with key-seat cuttersin which the tool-feeding device is so constructed that it is possiblefor the tool to be fed forward too fast or too far, because of a chip ofmetal or other obstruction becoming lodged befeeding wedge and the backof the cutting tool. Such a mishap has frequently been the cause ofspoiled work, and has also resulted in breaking'the harclened steel toolhead from its bar, causing frequent delays and considerable expense forrepairs.

My present invention avoids these difiiculties by providing a mountingand an ad justing or feeding device for the tool, so constructed that itis impossible for the tool to chatter, and also impossible for the toolto be accidentally fed forward by accumulation of dirt on the backing orthrust-resisting support that holds the tool to its work.

With the above and certain other objects in view which will appear laterin the speci fication my invention consists of the devices described andclaimed and the equivalents thereof.

In the drawings, Figure l is a side view broken away in part of thestationary guide that carries the cutting rod.

Specification of Letterslatent.

two parallel upwardly-extending side PatentedSejptJi'Y, 191s.

Application filed iviarii 24, 1916. serial no; 86,428.

Fig. 2 is a top plan view of: theisame. I

Fig. .3 is a front view ofthe vertically movable 'tool carrying' ba r.

Fig. .4 is a sideview of the same.

Fig. 5 is a front view of the cutter bar. Figl 6'is a vertical sectionon line 6 6 of Fig. 5.

'Fig'. 7 is a transverse section on line 7-7 of Fig. 6.

Fig. 8 is a perspective view, partly broken away, showing the guide,tool-carrying bar and cutter bar assembled,

As is clearly shown in the drawings, the device consists'in a stationaryguide post 1 secured to the bed 2 of a key-seating machine-in anysuitable manner, as by set bolts 3. The guide post has a hole 4 ofrectangular cross section extending lengthwise from end to end, and alongitudinal slit 5; A

vertically movable tool-carrying bar 6.,of

rectangular crossfs'ection is slidingly re ceived in the hole 4of'theguide post, and is adapted to be actuatedby anysuitable powermechanism of the key-seating, machine, not shown. l

The upper end of the tool-carrying bar 6 is formed with a longitudinalslot 7, which divides the upper part ofthe bar to form members 8, 8,which are slidingly received in the rectangular hole 4 of the. guidepost. The inner faces of the side members 8 are formed with diagonallydisposed grooves 9, 9 extending from the upper ends of the side members8 downwardly and rearwardly, as shown in Fig. 6. Between the two sidemem-' bers 8, 8 a cutter bar 10 is received, the upper end of the cutterbar formed with a cutting tooth 11.

At each-side of the cutter bar 10 is a diagonally disposed tongue 12,which is slidingly received in the groove 9 of one of the side members8. It will be understood that the vertically movable tool-carrying bar6, which travels up and down in the hole 4 of the stationary guide post1, carries with it the cutter bar 10, the cutting edge of the tooth 11projecting through the slit 5 and slightly beyond the periphery of theguide post 1, the amount that the tooth projects beyond the guide postdetermining the depth of the out.

To feed the tool forwardly or into the work, it is only necessary toproject the cutter bar upwardly with relation to the tool I carrying bar6, and to reduce the out, the

ment of the bar 10 with respect to the tool-' carrying bar 6. This withthe groove 9 cutter bar 10'is drawn downwardly with relation to the toolcarrying bar.

The diagonally disposed tongues 12 of the cutter bar 10, in their closeen the tool-carrying springing forward of the tooth 11 and hold thetooth accurately to its adjusted position with relation to the work,while permitting the toothto be easily and yet positively fed into thework by proper longitudinal adjustadju'stment may be effected by anyusual or well-known mechanism for the purpose. Such mechanism is commonin key-seating machines and is not illustrated because it forms no partof the present invention.

Since the side members 8 accurately fit the hole 4 in the guide post,there is no chance for dirt or chips to get behind-the tooth 11 orbehind the side members 8, and thereby feed the tooth into the work toofast. Moreover the tooth 11 is strongly reinforced at its root, which isnormally its weakest point, by the projecting ton ues '12.

By the means above described I have produced a' simple, yet strong anddurable tool holding device for key-seating machines that permanentlyand accurately retains its adjusted position without liability of beingCopies of this patent may be obtained for agement' of the side members 8of 7 bar 6, effectually prevent j vtool bar to ing respect velythegrooves of said bifur-' thrown out of adjustment by accumulation of dirtor chips, and consequently does its work with exactness and uniformity;

' Having thus described my invention, what I claim and desire to secureby Letters Patent is: I

In a tool holder for key-seating machines, a fixed guide post opening ofrectangular cross section therehaving a longitudinal through and alongltudinal slit therein,- a

bifurcated bar of rectangular cross section slidingly received in theopening'of said guide post, the 1nner' face of each member of saextending from the tongue on each side of said bar, said tonguesextending from the upperiextremity of said the rear face thereof andengagcated bar. 7

In testimony whereof I affix my signature in presence of two witnesses.

, wi, LLIAM GILES. Witnesses: V i

v F. M. MABKs, CARRIE E BURKHoLDnR.

five cents each, by addressing the Commissioner of Patents; Washington,D. G. I i

id bifurcated bar formed with a diagonally disposed groove upperextremity of said bar to the rear face

